Source : WordNet®

mill about
     v 1: be about; "The high school students like to loiter in the
          Central Square"; "Who is this man that is hanging around
          the department?" [syn: {loiter}, {lounge}, {footle}, {lollygag},
           {loaf}, {lallygag}, {hang around}, {mess about}, {tarry},
           {linger}, {lurk}, {mill around}]
     2: move about in a confused manner [syn: {mill}, {mill around}]